1156156340 has 36 divisors (see below), whose sum is σ = 2514573516. Its totient is φ = 446509056.

The previous prime is 1156156333. The next prime is 1156156423. The reversal of 1156156340 is 436516511.

It can be written as a sum of positive squares in 6 ways, for example, as 24641296 + 1131515044 = 4964^2 + 33638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1156156297 and 1156156306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17549 + ... + 51188.

Almost surely, 2^1156156340 is an apocalyptic number.

1156156340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156156340 is an abundant number, since it is smaller than the sum of its proper divisors (1358417176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156156340 is a wasteful number, since it uses less digits than its factorization.

1156156340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68804 (or 68773 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1156156340 is about 34002.2990399179. The cubic root of 1156156340 is about 1049.5557727811. Note that the first 3 decimals are identical.

The spelling of 1156156340 in words is "one billion, one hundred fifty-six million, one hundred fifty-six thousand, three hundred forty".